Design and simulation of a high contrast grating organic VCSEL under electrical pumping

• We propose an electrically pumped high contrast grating (HCG) – based OVCSEL.
• The active region consists of organic layers with two contacts for carrier injection.
• We use the multilayer dielectric mirror and HCG as the top reflector.
• We model the static and dynamic characteristics of the electrically pumped OVCSEL.
• We show that the structure can reach the lasing with a current density above 2 A/cm2.

We propose an electrically pumped high-index-contrast grating (HCG)-based organic vertical-cavity surface-emitting laser (OVCSEL). The microcavity structure consists of an organic light emitting diode inserted in a very high quality factor hybrid photonic crystal (HPC) in which the top DBR is replaced by a sub-wavelength HCG layer. The results of simulation show that quality factor of the proposed microcavity is at least 280,000. Therefore, a considerable reduction of the laser threshold under electrical pump is expected. We also investigate the threshold behavior and the dynamics of the OVCSEL under electrical pump. Results from numerical simulation show that the structure can reach the lasing condition under electrical pump with a current density above 2 A/cm2.

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